Stairway construction



E. G. ELGOOD STAIRWAY CONSTRUCTION Filed Sept. 2l, 1934 Ifatented Dec. 10, 1935 UNITED STATES PATENT OFFICE Application September 21, 1934, Serial No. 744,994 In Great Britain September 19, 1933 2 Claims.

This invention relates to the method of constructing stairs, and refers in particular to stairs of the kind in which the foundation of the treads and risers of the stairs is formed of concrete or 5 like material, although the invention may be applied to stairs where the treads and risers are made of wood. The object of the invention is to construct stairs preferably of the kind in which the treads and risers are formed with a foundation of concrete or like material, with an outer part or nish of cork or cork composition, whereby practically all noise when ascending and descending the stairs is eliminated, and a surface provided possessing a certain amount of elasticity, and which is non-slip.

When constructing stairs in which the foundation of the treads and risers is formed of concrete o1` like material, according to this invention in that portion of the foundation constituting the tread, I form a rebate in the concrete extending from the edge of each stair a short distance inwards towards the riser, thereby providing a shoulder in the tread where the rebate terminates. I then cover the whole surface of the concrete, of both the treads and risers, with a mastic cement, and on the top of this mastic cement I place a layer or layers of cork tiles or slabs, preferably made of compressed cork granules, or a cork composition, the mastic cement joining or uniting the cork tiles or slabs with the foundation.

The. invention is illustrated on the accompanying drawing.

Fig. 1 is a broken perspective View of a portion of a staircase with the treads and risers constructed according to this invention.

Fig. 2 is an enlarged broken cross sectional View of a portion of a stair.

When the stairs are constructed with a foundation of concrete A or like material, the finished surface a of such foundation preferably consists of sand and cement screed. Formed in that portion of the foundation constituting the tread is a rebate extending from the edge of each stair a short distance inwards towards the riser, thus providing a shoulder a2. The nished surface of both the treads and risers of the foundation, is then coated with a mastic cement a3, the layer or layers of cork tiles or slabs B, preferably made of compressed cork granules, or cork composition, being placed on the mastic cement, such cement joining or uniting said slabs or tiles B with the foundation A, as clearly shown by Fig. 2.

As the slabs or tiles of cork B where the rebate in the foundation A of the treads is formed must necessarily be of greater depth than the remaining portion of the tread, the nosings b are of sufficient thickness for the purpose, and if desired 5 the tiles o-r slabs forming such nosings may be made of cork of a heavier density than the slabs forming the remaining portion of the tread and those forming the risers.

If desired or found necessary the slabs or tiles forming the nosings may be spiked to the foundation A so as to more securely hold them in position.

What I claim as my invention and desire to secure by Letters Patent iszl5 1. A stairway providing tread and riser base portions, the tread base portion providing a rebate extending inwardly from its front portion throughout the length of the tread base, a shoulder formed by said rebate at the junction of said 20 rebate with the adjoining rear part of the tread, cork tread and riser surfacing slabs secured upon said tread and riser base portions, there being a nosing tread slab portion in said rebate of greater density than the remainder of the tread slab portions, said shoulder preventing rearward shifting of said nose portion, said nosing tread slab portion being secured to both said rebate and shoulder and being of such thickness that its top surface forms a continuation of the plane of the rear tread slab portion, and the cork riser surfacing slabs overlying the rear ends of tread slab portions to assist in retaining same in place.

2. In a stairway, a base tread portion of hardened plastic material providing a rebate extending rearwardly from the forward edge and extending throughout the length of the base tread portion, a shoulder formed by said rebate at the junction of the rebate with the adjacent rear part of said base tread portion, cork slab surfacing secured on the rear part of said tread base and having its forward edge terminating flush with said shoulder, a cork nosing slab in said rebate and being of greater thickness and density than said first-mentioned slab, the upper surfaces of said slabs forming continuations of one another and lying in substantially the same plane, said shoulder sustaining said nosing slab against rearward movement, and means securing said nosing slab to both the bottom of said rebate and to said shoulder.

EDWARD GORDON ELGOOD. 

